Question 10 Unsaved

Mathematics

1 answer:

Irina18 [472]3 years ago

8 0

2 times inscribe angle

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A square has 9 inch sides . Every side of a pentagon is also 9 inches long are the perimeters the same

DaniilM [7]

No because a pentagon has more sides than a square does.
to find perimeter you have to add up all the sides.
for the square it would be 9+9+9+9 which is 36

for the pentagon it would be 9+9+9+9+9 which is 42.

7 0

4 years ago

a truck and its load weighs 22,800 pounds. if the load weighs 12,400 pounds more than the truck, how much does the truck weigh

pochemuha

The truck will weigh 35,200 pounds

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3 years ago

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mote1985 [20]

Step-by-step explanation:

ay guey como estas yo no entiendo este tipo de matematica para nerds

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3 years ago

Two hundred undergraduate students were randomly selected from a university that has 47,000 students in total. Systolic blood pr

Hoochie [10]

Answer:

The correct option is d

Step-by-step explanation:

From the question we are told that

The population size is $N = 47000$

The sample size is $n = 200$

The sample mean is $\= x = 118.0 \ mmHg$

The standard deviation is $\sigma = 11.0 \ mmHg$

Given that the confidence level is 95% then the level of significance can be calculated as

$\alpha = 100 - 95$

$\alpha = 5 \%$

$\alpha = 0.05$

Next we obtain the critical value of $\frac{\alpha }{2}$ from z-table , the value is $Z_{\frac{\alpha }{2} } = Z_{\frac{0.05 }{2} } = 1.96$

The reason we are obtaining critical value of $\frac{\alpha }{2}$ instead of $\alpha$ is because

$\alpha$ represents the area under the normal curve where the confidence level interval ( $1-\alpha$ ) did not cover which include both the left and right tail while